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BEST AvAxLABLE com Y Lsgzgf sept' i4 y 19m J. G. MOLEN TONE MODIFIERFiled DSO, 11, 1924 2 Shee'cxs--Sheel 1 fag] BEST AVAILABLE com J. G.NOLEN -TONE MODIFIER Filed Deo. ll, 1924 2 Sheets-Sheet Z BEST AVAILABLEcoeA Patented Sept. 14, 1926.

.. UNITED STATES JAMES G'. NOLEN, OF NEW YOR K,*N. Y.

TONE MODIFIER.

Application led December 11, 1924. Serial No. 755,213.

The present invention relates to radio or phonograph horns andparticularly to vmeans Jor modifying and modulating the sound emittedthereby, and one object of e the invention is to provide in a radio orphonograph horn a resonator which receives the sound from the radioapparatus or phonograph and a tone modifier and modulator cooperatingwith the resonator. e Another object of the invention is to provide in aradio or phonograph horn a resonator which receives the sound from theradio apparatus or phonograph and a tone modifier and modulatorcooperating with the resonator and provided with means for regulatingthe modiiierand modulator.

These objects and such other objects as may later appear herein areattained by the invention two of the` possible embodiments of which aredescribed by way of example in the subjoined specification and shown in-the drawing accompanying thespeciiication in which Fig, 1, is a sideview of one form of the resonator and tone inodiiier applied to a zradio or phonograph horn, the resonator and a portion of the horn beingin section.

Fig. 2, is a front view of the form of the invention shown in Fig. 1,thecasing of the horn being partly broken away to show the tone modifierand modulator.

' Fig. 3, is a side view of the resonator land another form of tonemodifier and modulator applied to aj radio or. phonograph horn, thereasonator and a portion of the horn and the tone modifier and modulatorbeing in section.

Fig. 4C is a view on the line 1 -1 of Fig. 3,

looking in the direction of the arrows. Y Fig. 5, is a sectional view ofthe resonator and showing one of the diaphragms thereof and itsretaining ring removed from and in adjacency to the resonator.

Figc-6, is a side view of .the resonator applied to a radio orphonograph horn and without the tone modiier and modulator, and showingthe manner of securing the resonator in thehorn,

Fig. 7, is asectional View of the resonator shown in Fig. 6 and showinga convenient im way of securing the diaphragm to the bony of theresonator and providing means for securing the resonator in the horn asseen in Fig. 6, and

Fig. 8 is an end view of the resonator.

Similar reference characters denote similar parts throughout the severalviews.

Referring to Fig. 1, the invention coniprises a horn having the mouthlO,the neck 11, the extended circular intermediate portion 12 vflat onopposite sides, and the resonator 13 received in the neck 11 of the horn11 which in turn is received in the extension 1-1 of the sound box 15.

The resonator 13 is of suitable light weicht metal, suchas aluminum,cylindrical in form and has the venturi orgsubstantially hour-glassshaped opening 16 therethrough for passage of sound, this venturi oropening being provided with thevsteps or series of transversecorrugations 1T and 18 extend- -ing inwardly from each end of theventuri oropening and meeting at about the middle transverse linethereof.

They diaphragm 19 Y, is; arranged, at the soundreceivingend of thelventuri 16 and isprovided with-the'centrally located aperture 20, andthe-diaphragm, 21 is arranged 19 in the present instance. being of silkand' i .the diaphragm 21 being of rubber.- The diaphragms 19 and 21jaresecured. in the venturi 16 by .turning fupwthe, ends; of the diaphragmsandv pressing. .the jupturned, ends against the.l adjacent innerWalls-of theventuri by means ofsretaining rings 23 vand y24, theapertures 2O and 22 being in axial alincrnent. .y c :v

The resonatorl' isinserted in-the neck 11 of the horn and isfrictionally held therein, the diaphragm 191 -being outward -or towardsthe interior ofthe sound box 15 and-the diaphragmv21 being inward ortowards the interior of the extension 12 of the horn,it being understoodthat the neck 11 'of the horn is thenlocated and friction- 1lly heldintheextension 14C of the sound The extension 12 vof the horn has in-itsinterior the circular partition 25 which provides diverging passages Xand Y for sound from the diaphragm 21 to the mouth 10 of the horn. Thepassage Y has the diaphragm 26 of rubber arranged across it extendinginthe diametric line of the eX- tension 12 from nearthe adjacent end ofthe neck 11 tothe partition 25, the diaphragm 26 being provided with thecentral aperture 27 which -is Smaller than either of the apertures or 22of the diaphragms 19 and 21.

The partition is provided with the opening 28 and has located centrallyof the partition the spindle or shaft 29 seated The butteriy;31` ,issecuredat one of its `ends'to the""spindl'e '29 'for turningtherewithandpassing through the opening 2% :extends across the passage X forpreventing passage of "sound therethroughA being limited inswingingmovement in one direcio by 'thestop Strip 32a-nd infuiefppo-.site directionb 'covering Contact with the diaphragm 26- 5 I l lThebutter'tiy carries the cover plate 33 for preventing passage ,ofsoii'nd through th'ef` pening' 28- to the; interior space'enfl`h'espindle29 is so rictionally'held 'iii its bearings that 'when turned .bythe finger piece the spindle and butterfly 31 will 'remain in ltheposition to 'which they are ftu'rned thus 'providing when brought'intocontact :with 'the stop strip 32'Tfor the passing 'from the' resonator13 into Vthe passage Y andthence to the mouth 1() of the horn 'by"wayilof the diaphragm26 of sound emanatingfronrthe resonator and modu-:iated-I by-th'e' diaphragm 26,' anjdproviding iwhenwthe butteri isbrought i'nto covering contact withf'the iaphragmV 26 for the pass- 'ingfrom the resonator 13 intothe passage 1X and thence to the mouth 10 ofthe horn of Asound Y emanating directly from the resonator and' freefrom action Vof 'the diaphragm l26,. modification of these effects be-ing obtained by setting the butterly-31 at intermediate -p'o'sitions-between the strip 32 and diaphragm 26.

Referringto Figs. 3 and 4, the resonator -34 is similar to the resonator13 and is received in the cylindrical casing 35, this casing,substantially at the line of the inner diaphragm of the resonator whenthe resonator is located in the casing, being extended -to provide theoffset 36 for supporting for pivotal movement the shank 37 of thediaphragm carrier 38 in which is secured by means of the retaining ring39 the diaphragm 40 of rubber having the aperture 41, which aperture issmaller than either of the apertures of the diaphragms of the resonator34. TheA shank 37 has cooperating therewith for pivotally moving thediaphragm carrier 38 the finger piece 42 whereby the carrier 38 anddiaphragm 440 may be moved in the casing 35 from a transverse positiontherein to an inclined position shown by the dot and dash lines, theintention being that when in transverse position the diaphragm40cooperatng with `the resonator 34'sliall provide in the upper.andpdiaphragni 40 are moved to inclined position sound is provided inthe upper .ortio'not` the casino' as emanatinfr directl P D D .y

from the resonator 34 and substantially free 'from action of thediaphragm 40, the eiiect boing substantially the same asthe Inovefnient'of the' bntteriiy 31 relative'to the diaphragm 26 before described, thecarrier 33 being settable at intermediate position tor l-niodifying theeffect, it being understood 'that 'the lower end 'of the horn 42 isreceived .'fricti'or'ially' held therein.I

Referring to Figs. '6 and 7 the resonator 43 issiniilar to theresonators 13 and 34 except that the diaphragm 44 is glued, cemented orotherwise suitably secured to the outer side of the body portion of the'reonaton and the diaphragm 45 is secured on the outer side of the bodyof the resonator by the' retaining ring 46 exteriorly engaging saidbody, a resonator thus being prvidedwhich is readily insertable in aYliorn"-47which is not provided with tone modifying and modulatinglmeans.

Having thus described my invention it- Vshould lie understood that theremay be modifications thereof and variations therein Without departingvfrom the spirit of the invention, or exceeding the scope of theappended claims.

-Vli'at I claim and desire to protect by Letters Patent is 1.In'combination with a sound duct, a resonator having a venturi likeopening passing.; therethrough, and means for modi` i'ying andmodulating sound cooperating with the resonator.

2. In combination with a sound duct, u iesonator comprising opposeddiaphragms and means for passage ot sound between the diaphragnis, andmeans ior n'iodii'ying and modulatingr sound cooperating with theresonator.

3. ln combination Witlia sound duct, a resonator comprising opposed;diaphragrns and :i venturi 'for passage. oi sound between thediaphragme, and means for modifying and modulating sound cooperatingWith the resonator.

ln combination with a sound duct, a

-resonator comprising opposed diaphragms and a venturi lim-'ingI steppedwalls for passage ot sound between tno diaphragms, and incans formodifying and modulating sgoundcooperating with the resonator.

5. In combination' with a sound duct, a resonator comprising opposeddiapbragms and a venturi having transverse corrugations on its'walis forpassage of sound he.- tweenrthe diaphragms, and means for modi- 'yingand modulating sound cooperating` with the resonator.

6. In combination with a sound duct a resonator comprising opposeddiaphragme of diti'erent resiliency and means for passage of soundbetween the diaphragms, and means for modifying and modulating soundcooperating with the resonator.

7. In' coml'iination with a' sound duct, a resonator comprising opposeddiaphragms ot di'i'erent resiliency and a veut-uri ior passage of soundbete-een the diaphragms, and means 'for modifying and modulating soundcooperating with the resonator.

8. In` combination with a sound duct, a resonator comprising opposeddiaphragns, one of sill: and the other of rubber and a .'entnrijforpassage-of sound between the diaphragnis, andv means' for modifying andmodulating sound cooperating withthe resonator. v.

9. In combination with a sound ducta resonator comprising opposedAdiaphragms each having an aperture therethrough and saidapertures'ditering in size and means for passage o f sound between the-diaphragms, andl means 'fr r modifying and modulating sound cooperatingwith theres onator. 'n

10. In combinaiion with .asound' duet, a resonator' comprising opposed'diaphragnis each having an aperture'therethrough and said apertures(littering in'size'and a venturi for passage'of sound between the'diaphragms, and means for modifying and modulating sound eoop'erati.gwiththe resonator. -Y

l1. In'combination with asound'duct, a resonator, 'a diaphragm 'forreceiving sound from the resonator for modulating the sound, and means'for'modirying'the sound'from the resonator by providing passage for .thesound from the resonator free from action of said diaphragm. I

12.'In combination with a sound duct,la resonator, a diaphragm forreceiving sound from the resonator for modulating the sound, and meansfor modifying'the soundrom the resonator by preventing vibratory contactof the sound with said diaphragm and diverting from said'diaphragm thesound from the resonator during passage of the sound.

13. In combination with a sound duct, a resonator, a diaphragm rforreceiving sound from the resonator for modulating the soundt and meansfor modifying the sound from the resonator by partially diverting fromthe diaphragm the sound from the resonator during passage of the sound.

i319? In combinationIWith'a-horn.' iiwing a BESTZAVAILABLE con 14. Incombination -With a vsound duct, a resonator, a diaphragm for receivingsound from the resonator for 'modulating the sound, and settably movablemeans for modifying the sound from the resonator by partially divertingfrom the diaphragm the sound from the resonator during passage of thesound.

`15. In combination'with a horn having a neck, a resonator having aventuri like opening passing therethrough arranged in the neck of thehorn.

16. In combination with a horn having a neck, a resonator arranged inthe neck ot' the horn and comprising opposed diaphragms and means forpassage of sound between the diaphragnis.

17. In combination with a. horn having a neck, a resonator arrangedv inthe neck of the horn and comprising opposed diaphragms and a venturi forpassageo'f sound between the diaphragms. A

18. In combination with a horn having a jmouth and neck, a'resonator-having a venturi' like Y opening 2 'passing therethrough arranged inthe neck of'the-hormandmeans for modifying 'and modulating soundcooperating Withthe-'resonator and arranged in the 1 horn between theresonatorV and mouth and'- af lneck, a resonator arranged in the neck ofthe horn, and means for modifying and modulating sound arranged. ilfthehorn between Ethe resonator'and mouth, said -means comprising adiaphragm fora'eceiving sound frmthe resonatorffdr'modulating the' soundand means 'for-:modifying the sound freni-the' resonator vtry-divertingfrom the diaphragm@ said sound-f during passage of-tl1'e"soimdv -romrtheresonator to themouth ofthe horn.

20s-In' combinationlwith: fa horn havingf a mouth and' a neck,a=resonator arranged in the neckof the horn, and -means for-modify- 'ingandl modulatingsound arrangedin' the horn' 'between' the resduatorandmouth, fsaid means comprisingla diaphragmfor-'receiving sound from' the1'esonator:;for..modulating the sound andwregulatable means formodifying the sound from the resonatoriby partially diverting said soundronrtlie"diaphragm during-passage of thesound from the resonator'to' themouth of the horn.

21. In combination with a horn having Ya mouth and a neck, a resonatorarranged in the neck of the horn, and means for modiying and modulatingsound arranged in the horn bet-Ween the resonator and mouth, said'-resonator comprising opposed: diaphragms and a rent-uri for paage ofsound between the diaphragms, said means comprising a diaphragm forreceiving sound from the resonator for modulating thesound and means formodifying the sound from the resonator by diverting said sound from thelast mentioned diaphragm during passage of the sound from the resonatortothe mouth of the horn.

22. In combination with a horn having a mouth and a neck, a resonatorarranged in the neck of the horn, and means for modifying and modulatingsound arranged in the horn .between the resonator and mouth, saidresonatorA comprising opposed diaphragnis and a venturi for passage otsound between the diaphragms, said means comprising a diaphragm forreceiving sound from the resonator for modulating the sound andregulatable means for modifying the sound from the resonator bypartially diverting said sound from the last mentioned diaphragm duringpassage of the sound from the resonator to the mouth of the horn. Y

23. In combination, a resonator comprising opposed dia-phragms and meansfor providing passage for sound between the diaphragms, and a diaphragmcooperating with the resonator for modulating thev sound emanatingtherefrom. i l Y 24. In combination, a resonator comprising opposeddiaphragms of different resiliency and a venturi for providing passagefor sound between the diaphragms, and a diaphragm cooperating with theresonator for modulating the sound emanating therefrom. A

25. In combination, a resonator comprising opposed dia-phragms ofdifferent resiliency each having an aperture therethrough and theapertures differing in size and a venturi for providing passage of soundbetween the diaphragms, and a diaphragm cooperating with theresonator-tor modulating the vsound emanating therefrom.

26. In combination, a resonator comprising opposed diaphragms ofdifferent Aresiliency each having an aperture therethrough and theapertures differing in size and a venturi orproviding passage for soundbetween the diaphragme, and a diaphragm cooperating with the resonatorand having an aperture therethrough smaller than either of the aperturesof the first dia-- phragms.

27. In combination, a resonator comprising opposed diaphragms ofdiierent resiliency each having an aperture therethrough and theapertures differing in size and a venturi having transversely corrugatedwalls for providing passage for sound between the diaphragms, and a.diaphragm cooperating with the resonator and having an aperturetherethrough smaller than either of the apertures of the firstdiaphragms.

28. A resonator comprising a body portion having a venturi therethroughand a diaphragm at each end of the venturi.

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29. A resonator comprising a body portion having a venturi therethroughprovided with transversely corrugated walls and a diaphragm at each endof the venturi.

30. A resonator comprising a body portion having a venturi therethroughprovided With transversely corrugated walls and a diaphragm at each endof the venturi, the diaphragms being of different resiliency and eachprovided with an aperture therethrough and the apertures differing insize.

31..In combination, a casing, a resonator in the casing and comprisingopposed diaphragms and a venturi for providing passage for sound betweenthe diaphragins, a carrier mounted in the casing and spaced a. distancefrom said resonator and movable from position at a right angle to theaxis of the casing to position at an inclination to said axis, and adiaphragm mounted in said carrier and movable therewith.

32. In combination, a casing, a resonator in the casing and comprisingopposed diaphragms and a venturi for providing passage of sound betweenthe diaphragms, a carrier mounted in the casing and spaced a distancefrom said resonator and movable from position at a right angle to theaxis of the casing to position at an inclina-tion to said axis andsett-able at intermediate positions of inclination to said axis, and adiaphragm mounted in said carrier and movable therewith.

33. A resonator comprising a body havling a tapering opening providedwith a stepped series of transverse corrugatiens extending rom end toend of the opening.

34. A resonator for sound passage, said resonator comprising a bodyhaving a venturi opening of substantially hour-glass shape passingtherethrough for passage of sound.

35. A resonator for sound passage, said resonator comprising a bodyhaving a venturi opening of substantially hour-glam shape passingtherethrough and provided with a stepped series of transversecorrugations.

36. A resonator for a. sound passage, said resonator comprising a lightWeight aluminum body of cylindrical exterior form and having a venturiopening of substantially hour-glass shape passing therethrough forpassage of sound, said venturi opening being provided with a stepped.'series ot transverse corrugations extending inwardly from each end ofthe venturi opening. the series meeting each-other at about the middletransverse lines of the resonator; and al diaphragm across one end ofthe body.

Signed at NewYork in the county ot' New York and State of New York this10th day of December A. D. 1924.

JAINIES G. NOLEN.

